From: Joonyoung Shim
This patch adds support for keypad driver running on Samsung SoCs. This
driver is tested on SMDK6410(S3C6410), SMDKC100(S5PC100), Aquila(S5PC110),
GONI(S5PC110) and SMDKV210(S5PV210) boards.
Signed-off-by: Joonyoung Shim
Signed-off-by: Kyungmin Park
Tested-by: Naveen Krishna Ch
[kgene@samsung.com: added comments]
Acked-by: Kukjin Kim
Signed-off-by: Kukjin Kim
---
drivers/input/keyboard/Kconfig |9 +
drivers/input/keyboard/Makefile |1 +
drivers/input/keyboard/samsung-keypad.c | 400 +++
3 files changed, 410 insertions(+), 0 deletions(-)
create mode 100644 drivers/input/keyboard/samsung-keypad.c
diff --git a/drivers/input/keyboard/Kconfig b/drivers/input/keyboard/Kconfig
index d8fa5d7..bf6a50f 100644
--- a/drivers/input/keyboard/Kconfig
+++ b/drivers/input/keyboard/Kconfig
@@ -342,6 +342,15 @@ config KEYBOARD_PXA930_ROTARY
To compile this driver as a module, choose M here: the
module will be called pxa930_rotary.
+config KEYBOARD_SAMSUNG
+ tristate "Samsung keypad support"
+ depends on SAMSUNG_DEV_KEYPAD
+ help
+ Say Y here if you want to use the Samsung keypad.
+
+ To compile this driver as a module, choose M here: the
+ module will be called samsung-keypad.
+
config KEYBOARD_STOWAWAY
tristate "Stowaway keyboard"
select SERIO
diff --git a/drivers/input/keyboard/Makefile b/drivers/input/keyboard/Makefile
index 4596d0c..8f973ed 100644
--- a/drivers/input/keyboard/Makefile
+++ b/drivers/input/keyboard/Makefile
@@ -32,6 +32,7 @@ obj-$(CONFIG_KEYBOARD_OPENCORES) += opencores-kbd.o
obj-$(CONFIG_KEYBOARD_PXA27x) += pxa27x_keypad.o
obj-$(CONFIG_KEYBOARD_PXA930_ROTARY) += pxa930_rotary.o
obj-$(CONFIG_KEYBOARD_QT2160) += qt2160.o
+obj-$(CONFIG_KEYBOARD_SAMSUNG) += samsung-keypad.o
obj-$(CONFIG_KEYBOARD_SH_KEYSC)+= sh_keysc.o
obj-$(CONFIG_KEYBOARD_STOWAWAY)+= stowaway.o
obj-$(CONFIG_KEYBOARD_SUNKBD) += sunkbd.o
diff --git a/drivers/input/keyboard/samsung-keypad.c
b/drivers/input/keyboard/samsung-keypad.c
new file mode 100644
index 000..4b56e6f
--- /dev/null
+++ b/drivers/input/keyboard/samsung-keypad.c
@@ -0,0 +1,400 @@
+/*
+ * samsung-keypad.c -- Samsung keypad driver
+ *
+ * Copyright (C) 2010 Samsung Electronics Co.Ltd
+ * Author: Joonyoung Shim
+ * Author: Donghwa Lee
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ */
+
+#include
+#include
+#include
+#include
+#include
+#include
+#include
+#include
+#include
+#include
+#include
+#include
+
+enum samsung_keypad_type {
+ KEYPAD_TYPE_SAMSUNG,
+ KEYPAD_TYPE_S5PV210,
+};
+
+struct samsung_keypad {
+ struct input_dev *input_dev;
+ struct clk *clk;
+ struct delayed_work work;
+ void __iomem *base;
+ unsigned short *keycodes;
+ unsigned int row_shift;
+ unsigned int rows;
+ unsigned int cols;
+ unsigned int row_state[SAMSUNG_MAX_COLS];
+ int irq;
+};
+
+static int samsung_keypad_is_s5pv210(struct device *dev)
+{
+ struct platform_device *pdev = to_platform_device(dev);
+ enum samsung_keypad_type type;
+
+ type = platform_get_device_id(pdev)->driver_data;
+ return type == KEYPAD_TYPE_S5PV210;
+}
+
+static void samsung_keypad_scan(struct samsung_keypad *keypad,
+ unsigned int *row_state)
+{
+ struct device *dev = keypad->input_dev->dev.parent;
+ unsigned int col;
+ unsigned int val;
+
+ for (col = 0; col < keypad->cols; col++) {
+ if (samsung_keypad_is_s5pv210(dev)) {
+ val = S5PV210_KEYIFCOLEN_MASK;
+ val &= ~(1 << col) << 8;
+ } else {
+ val = SAMSUNG_KEYIFCOL_MASK;
+ val &= ~(1 << col);
+ }
+
+ writel(val, keypad->base + SAMSUNG_KEYIFCOL);
+ mdelay(1);
+
+ val = readl(keypad->base + SAMSUNG_KEYIFROW);
+ row_state[col] = ~val & ((1 << keypad->rows) - 1);
+ }
+
+ /* KEYIFCOL reg clear */
+ writel(0, keypad->base + SAMSUNG_KEYIFCOL);
+}
+
+static void samsung_keypad_worker(struct work_struct *work)
+{
+ struct samsung_keypad *keypad = container_of(work,
+ struct samsung_keypad, work.work);
+ unsigned int row_state[SAMSUNG_MAX_COLS];
+ unsigned int val;
+ unsigned int changed;
+ unsigned int pressed;
+ unsigned int key_down = 0;
+ int col, row;
+
+ clk_enable(keypad->clk);
+
+ val = readl(keypad->base + SAMSUNG_KEYIFSTSCLR);
+
+ /* interrupt clear */
+ writel(~0x0, keyp
